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Finding the Fourth Proportional to 1,115.41, 1,671.43 and 883.35

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Solution

The fourth proportional to 1,115.41, 1,671.43 and 883.35 is: 1,323.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.41 : 1,671.43 = 883.35 : x
  2. Step 2: Convert to fraction form
    1,115.41/1,671.43 = 883.35/x
  3. Step 3: Cross multiply
    1,115.41x = 1,671.43 × 883.35
  4. Step 4: Simplify right side
    1,115.41x = 1,476,457.69
  5. Step 5: Solve for x
    x = 1,476,457.69/1,115.41
  6. Step 6: Final answer
    x = 1,323.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.